C++/STL Basics/parameter constraint

 
 
#include <algorithm>
#include <vector>
#include <iostream>
using namespace std;
int getMaxInt(vector<int>& v) {
  return *max_element(v.begin( ), v.end( ));
}
int getMinInt(vector<int>& v) {
  return *min_element(v.begin( ), v.end( ));
}
int main( ) {
  vector<int> v;
  for (int i=10; i < 20; ++i) v.push_back(i);
  cout << "min integer = " << getMinInt(v) << endl;
  cout << "max integer = " << getMaxInt(v) << endl;
}
  /* 
min integer = 10
max integer = 19
 */